20990565

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{367}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 38578176

約数和(自身を除く): 17587611

約数列:

[1, 3, 5, 9, 15, 31, 41, 45, 93, 123, 155, 205, 279, 367, 369, 465, 615, 1101, 1271, 1395, 1835, 1845, 3303, 3813, 5505, 6355, 11377, 11439, 15047, 16515, 19065, 34131, 45141, 56885, 57195, 75235, 102393, 135423, 170655, 225705, 466457, 511965, 677115, 1399371, 2332285, 4198113, 6996855, 20990565]

約数ペア:

[(1, 20990565), (3, 6996855), (5, 4198113), (9, 2332285), (15, 1399371), (31, 677115), (41, 511965), (45, 466457), (93, 225705), (123, 170655), (155, 135423), (205, 102393), (279, 75235), (367, 57195), (369, 56885), (465, 45141), (615, 34131), (1101, 19065), (1271, 16515), (1395, 15047), (1835, 11439), (1845, 11377), (3303, 6355), (3813, 5505)]